采用实验室模拟试验,研究了曝气沉砂预处理中不同曝气时间和曝气强度、重力沉淀预处理中不同沉淀时间下对生活污水悬浮固体的去除效果,确定了合适的曝气沉砂和初沉试验参数,考察了后续生化处理的效果,并与采用污水处理厂实际预处理参数...采用实验室模拟试验,研究了曝气沉砂预处理中不同曝气时间和曝气强度、重力沉淀预处理中不同沉淀时间下对生活污水悬浮固体的去除效果,确定了合适的曝气沉砂和初沉试验参数,考察了后续生化处理的效果,并与采用污水处理厂实际预处理参数的处理效果进行了比较。结果表明,曝气沉砂合适参数是曝气量0.095 m3/h,曝气时间3 m in,曝气头高度离底1.5/5,生活污水中悬浮固体、含沙量、总氮、总磷和总化学需氧量的去除率分别为21.18%、43.56%、2.91%、2.02%、5.63%。重力沉淀的合适初沉时间为30 m in,生活污水中悬浮固体、总氮、总磷和总化学需氧量的去除率分别为50.1%、3.5%、10.1%、31.87%。对后续生化处理无不良影响,预处理适当。展开更多
Effects of nutrients released from sediments on eutrophication in lakes and reservoirs were not well known in China. In the test, the release conditions of nitrogen and phosphorus from the sediments were observed by b...Effects of nutrients released from sediments on eutrophication in lakes and reservoirs were not well known in China. In the test, the release conditions of nitrogen and phosphorus from the sediments were observed by batch experiment. The test results revealed that the content released is correlated to the initial content of organic matter in sediments. In the Gengjing area, when the water quality of waterway, grit chamber and reservoir were compared, the water quality of the waterway was the highest, and lowered in the order of the grit chamber and the reservoir. The grit chamber could get not only fine sand removal but also the organic substance, nitrogen, phosphorus and phytoplankton, therefore it is important to operate and maintain the grit chamber to preserve the water quality of the reservoir. Due to little organic substance in sediments, ammonium nitrogen and phosphorus weren't released during the incubation. But from the absorptiometric turbidity unit (ATU) test results, although the release of ammonium concentration was very low, ammonium oxidizing and nitrite oxidizing bacteria existed in sediments.展开更多
文摘采用实验室模拟试验,研究了曝气沉砂预处理中不同曝气时间和曝气强度、重力沉淀预处理中不同沉淀时间下对生活污水悬浮固体的去除效果,确定了合适的曝气沉砂和初沉试验参数,考察了后续生化处理的效果,并与采用污水处理厂实际预处理参数的处理效果进行了比较。结果表明,曝气沉砂合适参数是曝气量0.095 m3/h,曝气时间3 m in,曝气头高度离底1.5/5,生活污水中悬浮固体、含沙量、总氮、总磷和总化学需氧量的去除率分别为21.18%、43.56%、2.91%、2.02%、5.63%。重力沉淀的合适初沉时间为30 m in,生活污水中悬浮固体、总氮、总磷和总化学需氧量的去除率分别为50.1%、3.5%、10.1%、31.87%。对后续生化处理无不良影响,预处理适当。
基金Sponsored by Liquid Specialties Project(Grant No. 2008ZX07211-007)
文摘Effects of nutrients released from sediments on eutrophication in lakes and reservoirs were not well known in China. In the test, the release conditions of nitrogen and phosphorus from the sediments were observed by batch experiment. The test results revealed that the content released is correlated to the initial content of organic matter in sediments. In the Gengjing area, when the water quality of waterway, grit chamber and reservoir were compared, the water quality of the waterway was the highest, and lowered in the order of the grit chamber and the reservoir. The grit chamber could get not only fine sand removal but also the organic substance, nitrogen, phosphorus and phytoplankton, therefore it is important to operate and maintain the grit chamber to preserve the water quality of the reservoir. Due to little organic substance in sediments, ammonium nitrogen and phosphorus weren't released during the incubation. But from the absorptiometric turbidity unit (ATU) test results, although the release of ammonium concentration was very low, ammonium oxidizing and nitrite oxidizing bacteria existed in sediments.
